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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchlib/docstore/idocumentstore.h>
#include <vespa/searchcorespi/flush/iflushtarget.h>
namespace searchcorespi::index { struct IThreadService; }
namespace proton {
/**
* This class implements the IFlushTarget interface to proxy a summary manager.
*/
class SummaryGCTarget : public searchcorespi::LeafFlushTarget {
public:
using FlushStats = searchcorespi::FlushStats;
using IDocumentStore = search::IDocumentStore;
MemoryGain getApproxMemoryGain() const override;
DiskGain getApproxDiskGain() const override;
SerialNum getFlushedSerialNum() const override;
Time getLastFlushTime() const override;
Task::UP initFlush(SerialNum currentSerial, std::shared_ptr<search::IFlushToken> flush_token) override;
FlushStats getLastFlushStats() const override { return _lastStats; }
uint64_t getApproxBytesToWriteToDisk() const override { return 0; }
protected:
SummaryGCTarget(const vespalib::string &, vespalib::Executor & summaryService, IDocumentStore & docStore);
private:
virtual size_t getBloat(const IDocumentStore & docStore) const = 0;
virtual Task::UP create(IDocumentStore & docStore, FlushStats & stats, SerialNum currSerial) = 0;
vespalib::Executor &_summaryService;
IDocumentStore & _docStore;
FlushStats _lastStats;
};
/**
* Implements target to compact away removed documents. Wasted disk space is cost factor used for prioritizing.
*/
class SummaryCompactBloatTarget : public SummaryGCTarget {
private:
size_t getBloat(const search::IDocumentStore & docStore) const override;
Task::UP create(IDocumentStore & docStore, FlushStats & stats, SerialNum currSerial) override;
public:
SummaryCompactBloatTarget(vespalib::Executor & summaryService, IDocumentStore & docStore);
};
/**
* Target to ensure bucket spread is kept low. The cost is reported as a potential gain in disk space as
* we do not have a concept for bucket spread.
*/
class SummaryCompactSpreadTarget : public SummaryGCTarget {
private:
size_t getBloat(const search::IDocumentStore & docStore) const override;
Task::UP create(IDocumentStore & docStore, FlushStats & stats, SerialNum currSerial) override;
public:
SummaryCompactSpreadTarget(vespalib::Executor & summaryService, IDocumentStore & docStore);
};
} // namespace proton
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